Tool for cutting the loops of velvet and like pile fabrics



( June 8, 1937.

P. SCHLEMPER TOOL FOR CUTTING THE LOOPS OF VELVET AND LIKE PILE FABRICS Filed Alig. 12, 1936 ll/"la INVEN TOR PAUL SCHLEMPER Patented June 8, 193 7 M TOOLFOR CUTTING THE LOOPS OF VELVET AND LIKE PILE FABRICS Paul Schlemper, Ohligs, Germany Application August 12, 1936, Serial No. 95,606

In Germany April 8, 1935 7 Claims.

In wires or tools for cutting velvet or like pile fabrics and having an interchangeable blade, it

is known for the blade to be displaceablymounted in the wire head so as to enable the whole of the cutting edge to be utilized. For this purpose, the

blade is mounted in the tool ,head so as to be pivotal either about its forward or about its rear end. In these constructions however the. blade has to be shifted by hand. It is an object oi the present invention to moun the blade resiliently in the wire head, so that the blade is shifted when the cutting pressure becomes excessive and, in particular, when the cutting edge becomes blunt.

'15 The invention lies in'so providing the blade,

which'is pivotally mounted in the wire'head', that it is under spring pressure acting counter to the cutting pressure andin the position of rest ap plies itself against a stop, whilst dill .ing the cut ting operation it is movedaway from this stop with increasing cutting pressure and is pressed upon the base of the recess in which itis located. This occurs particularly when the part of the cutting edge nearest to the head of the tool has become blunt, .that is, when the pressure exerted by the loops of the fabric on this part of the blade increases. This increased pressure forces the pivotally mounted blade downwards, so that the blade sinks against the action of the spring means and a1 difierent part of the cutting edge comes into Advantageously, in accordance with one feature of the present invention, the blade is mounted so that the head of the blade, which is pro longed beyond the pivot point, applies itself with- In order to avoidprojecting edges,projections,

or the like as far as possible, according to a further feature of the invention, a lug or flange is bent out of the upper edge of the wire head, be- .neath which a U-shaped spring is disposed about a pin, one limb of said spring pressing inwardly against the, lug whilst the angularly bent end of theother limb of the spring is located in a slot provided in the wire head. By this construction of the wire head the additional advantage is achieved that the U-shaped spring cannot be lost.

In this construction therefore the spring is located between the side walls of the wire head,

55 which makes the latter relatively thick. The invention includes various further features which provide for the wire head being of the same thick: ness as in the case of the ordinary kind of tool in which the blade is not under spring pressure.

In one modification of the invention a resilient finger resting on one wall of the wire or rod and engaging over the-head of the blade is provided in continuation of the stop supporting the blade head. By means of this finger, the blade head is' constantly pressed against the said stop except 1o when the cutting pressure increases, due to the.

blade becoming blunt, in which event the blade head is raised from the stop against the spring action of the finger.

In a further modification of the invention a 15 spring is disposed in the space between the lower edge of the blade and the bottom of the recess, this spring pressing against the-lower edge of the blade and the bottom of the'recess respectively, In this case also the blade head is only 0 as thick as a tool of the ordinary kind, the space already existing being utilized for receiving the spring. a

In order that the invention may be clearly understood and readily carried into practice I have appended hereto one sheet of drawings illustrating the same, and to which reference will now be made. I

Figure 1 is a side elevation of a construction of velvet cutting wire according to the invention,

with the blade depressed on to the bottom of its recess, I

Figure 2 is a side elevation of the tool with the blade ready for use, that'is to say, not depressed,

Figure '3' shows the manner in which the blade is inserted,

Figure 4 is a section on line IVIV,Fig. 1,

Figure 5 is a section on line VV, Fig. 1,,

Figure 6 is a side elevation of a modified construction of the tool, before the blade has been swung into position,

Figure 7 shows the tool of Fig. 6 with the blade in position, 1

Figure 8 is a section on line VIII-VIII, Fig. '7, Figure 9 is a plan-of the. tool of Fig. 7, Figure 10 shows a further modified construction of the tool, with the blade in position,

Figure 11"isa. section on line XlZ'--XI, Fig. 10. Referring, now .to the drawing, the velvet cuting wire or tool I has a recess 2 in which the blade is located. Inthe normal po'sitiondFigs. 2, 7 and 10) the bottom 3 of the recess is a comparatively great distance away from the lower edge 4 of the blade. -At its forward part the blade has a hole through which a. pin 5 passes.

This pin Iis securedin of thetool and acts as a bearing or pivot for the blade (Figs. 3

and 6). The head 6 of the blade-has an upper longitudinal edge I and a lower edge I. When the blade has been inserted the edge I lies in front of the shoulder I of the stop ll provided in the tool head Ill. Opposite this stop ii, which has an incline l2 merging gradually into the plane of the tool head, there is provided the cheek or flanged part I3 (Figs. 1-5) which is folded over from the upper ed e of the tool head leaving a space between it and the main plane of the tool. Beneath, the flange ii there is disposed a U-shaped spring II, which is arranged about a pin it. One limb II of the spring bears constantly against the flange l3, whilst the end llof the other limb III is bent and fitted into 'a \slot 2| provided in the tool head. This bent end the effective position.

In the constructions according to Figs. 6-11 the blade has a longitudinal slot through which passes the pin 5 that is adapted to the shape of the slot, being so formed as to effect a bayonetlike locking of the blade when the latter is inserted.

Instead of a spring being arranged as in the embodiment described above, in the construction according to Figs. 6-9, there is provided, in continuation of the stop li, a resilient flnger i5 which lies on the wall I II of the tool but is not rigidly attached thereto. The forward end of this flnger l5 engages over theedge I of the blade head I and bears against this edge 'i.

The finger is about asthick as a wall of the tool head, so that the tool head altogether is not thicker than the-head of an ordinary doublewalled velvet cutting wire.

The blade head 8 is provided 'with a V-shaped notch 23, and a corresponding recess 24 is arranged in the head of the tool. When the'bladehead I is in the position shown in Fig. "l, the notch II registers with recess 24 but is longer than the latter. Thus a pointed instrument can be introduced into the recess and levered to lift the edge 4 ofthe blade; One'limb I! of the springblade over the stop II. The recess 24 and notch permit a ready insertion .of the blade in the tool and a sure and accurate engagement of the head of the blade.

In the embodiment according to Figs. 10 and 11 the springlI- is located in the space between the bottom I of the blade recess and the lower bears against the blade edge 4 and its other limb l1 bears against the rece ss' bottom a. As shown in Fig. 11, the spring is no ,wider than the recess itself, so that the tool remains quite normal as regards its dimensions. Naturally,- instead of this U-shaped spring a leaf spring may be employed. ,Furthermore, especially in the case of very thintools with narrow recesses, an additional lateral recess may be provided for receiving the spring. a

cutting pressure, and a stop against which said "blade is adapted to rest in the normal position,

said blade being adapted to be moved from said stop and depressed towards the" bottom of said recess when the cutting pressure increases.

2. A tool for cutting the loops of velvet and like pile fabrics comprising a recessed portion, a pivotally mounted blade disposed in said recess. a shoulder on said blade, 9. spring adapted to bear on one edge of said shoulder in a direction opposite to that of the cutting pressure, and a lateral projection adapted to act as a stop for the lower. edge of said shoulder, said blade being adapted to be moved awayfrom said stop and depressed towards the bottom of said recess when the cutting pressure increases.

3. A .tool for cutting the loops of .velvet and like pile fabrics, comprising a recessed portion, a blade disposed in said recess and pivotally mounted on the head of the tool, a spring adapted to bear on the upper edge of said blade ,on the side of the pivot opposite the cutting portion of the blade, and a lateral projection at the head .of said tool adapted to act as a stop for said blade.

4. A tool for cutting the loops of velvet and like 'pile fabrics, comprising a cutting blade pivoted on the head of saidtool and prolonged a the head of said tool adapted to act as a stop for the lower edge of said'proionged portion.

5. A tool according to claim 4, wherein said spring is carried on the head of the tool and is housed-in a recess formed by bending over the upper edge of the tool head, one end of the spring being bent. over and engaging in a hole in the tool head.

6. A tool for cutting the loops of velvet and like pile 'fabrlcs, comprising a cutting blade pivoted on the head-of said tool and prolonged on the side of the pivot opposite the cutting portion of the. blade, a lateral projection adapted to act as a stop for the lower edge of said prolonged blade portion, and a resilient flnger member forming a. continuation of said projection and adapted td bear on the upper edge of said prolonged blade portion.

' 7. A tool forcutting the loops of velvet and like pile fabrics, comprising a blade disposed in a recessed portion of said tool and pivoted at the head of the tool, said blade being prolonged on the side of the pivot opposite the cutting edge blade in said recessed portion oi." the tool on the side of the pivot opposite said prolonged portion, said spring being adapted to urge the blade in a direction opposite to that of the cutting pressure.

mm. scnrmna.

" of the blade, a lateral projection adapted to act 

